I had to attend a site meeting yesterday and due to my daughter's low immune system I had gloves and a mask on, in addition to the usual safety boots, hard hat, and fluorescent coat. The other 6 people at the meeting had no gloves or masks. Admittedly it was in a burnt out building, but at times people were not 2m away from each other. These people were not unintelligent, there were two structural engineers, a surveyor, a conservation architect, and directors of the contractors. The lads working on the site had masks and gloves on.
Some people think it will never happen to them, but that is like saying you will never win a bet on a horse at 100-1, it does happen.